Source Code : log4j: layout demo

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log4j: layout demo

  
/*
Logging In Java with the JDK 1.4 Logging API and Apache log4j
by Samudra Gupta    
Apress Copyright 2003 
ISBN:1590590996

*/

import org.apache.log4j.Logger;
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.TTCCLayout;
import org.apache.log4j.NDC;

public class LayoutDemo {
  private static Logger logger = Logger.getLogger("name");

  private ConsoleAppender appender = null;

  private TTCCLayout layout = null;

  /** Creates a new instance of LayoutDemo */
  public LayoutDemo() {
    //set the parent additivity to false
    logger.setAdditivity(false);

    //initialize the layout
    layout = new TTCCLayout("yyyy-MM-dd");

    //initialize the console appender with the layout
    appender = new ConsoleAppender(layout, "System.out");

    //adding the console appender to the logger
    logger.addAppender(appender);
  }

  public void computeSquareRoot(double number) {
    NDC.push(new Double(number).toString());
    double sqrt = Math.sqrt(number);
    logger.info("The sqrt value: " + sqrt);
    NDC.pop();
  }

  public static void main(String args[]) {
    LayoutDemo demo = new LayoutDemo();
    demo.computeSquareRoot(22);
    demo.computeSquareRoot(44);
  }
}


           
         
    
  

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